My 74 Scamp has had the rear and front window gaskets replaced 5-6 years ago and they used the 3M window weld stuff on the body side and the glass side to help seal it. I have had to have the scamp set outside for a few months thinking it was sealed up. Well it leaks. Front is leaking down on each side and running down where the inside sheet metal and door frame metal meet, then running onto the floor, The rear is leaking on the drivers side about half way up... What should I seal it up with?? How to seal it up??